Product Overview

The Bently Nevada 990-04-50-01-01 is a high-precision, loop-powered vibration transmitter engineered to provide continuous machinery protection for essential industrial assets. This 2-wire device interfaces directly with 3300 NSv proximity probes and extension cables, conditioning the raw eddy current signal into a standardized 4 to 20 mA output proportional to radial vibration. Designed for high-reliability monitoring where a full rack-based system is not required, this transmitter allows for easy integration into PLCs, DCSs, or SCADA systems. Its compact, rail-mounted form factor and robust electrical protection make it a foundational component for automated machinery safety and predictive maintenance strategies.

Technical Measurement Parameters

• Output Signal: 4 to 20 mA DC (proportional to peak-to-peak vibration)

• Full-Scale Range: 0–4 mils (0–100 μm) peak-to-peak

• System Length Compatibility: 5.0 meters (16.4 feet)

• Probe Compatibility: Bently Nevada 3300 NSv proximity sensors

• Frequency Response: 5 Hz to 6,000 Hz (+0, -3 dB)

• Input Voltage: 12 to 35 VDC (loop-powered)

• Hazardous Area Rating: CSA Division 2 certified

• Mounting Configuration: Integrated 35 mm DIN rail clips

• Current Limiting: Typically 23 mA to protect signal loops

• Physical Weight: ~0.44 kg (including clips)

Industrial Utility and Deployment

This vibration transmitter is specifically optimized for Original Equipment Manufacturer (OEM) applications and plant-wide monitoring of smaller rotating machinery. It is commonly deployed on centrifugal air compressors, cooling tower fans, small pumps, and industrial motors where tracking shaft vibration is critical for preventing catastrophic mechanical failure. Because it utilizes a simple 2-wire configuration, it is ideal for remote locations or space-constrained control cabinets where minimal wiring is preferred. By providing a direct 4-20mA interface, the 990-04-50-01-01 enables facilities to implement high-level safety logic and alarming for general-purpose equipment, ensuring operational uptime in power generation, water treatment, and manufacturing sectors.